<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>2-JS创建虚拟DOM</title>
</head>
<body>
    <!-- 准备好DOM容器 -->
    <div id="test"></div>

    <!-- 必须按照顺序引入JS -->
    <!-- 引入React核心库 -->
    <script src="../js/react.development.js"></script>
    <!-- 引入react-dom库，用于操作DOM -->
    <script src="../js/react-dom.development.js"></script>

    <script type="text/javascript">
        // 1. 创建虚拟DOM
        // 这里不能加引号
        // React.createElement(HTML Tag, HTML属性对象, 标签内部内容)
        const VDOM = React.createElement('h1', {id: 'title'}, React.createElement('span', {}, 'Hello, React'))

        // 2. 渲染虚拟DOM到页面
        ReactDOM.render(VDOM, document.getElementById('test'))
    </script>
</body>
</html>